The AD9852 digital synthesizer is a highly integrated device that uses advanced DDS technology, coupled with an internal high speed, high performance D/A converter to form a digitally programmable, agile synthesizer function. When referenced to an accurate clock source, the AD9852 generates a highly stable frequency-, phase-, and amplitude-programmable cosine output that can be used as an agile LO in communications, radar, and many other applications. The innovative high speed DDS core of the AD9852 provides 48-bit frequency resolution (1 μHz tuning resolution with 300 MHz SYSCLK). Maintaining 17 bits ensures excellent SFDR.

The circuit architecture of the AD9852 allows the generation of output signals at frequencies up to 150 MHz, which can be digitally tuned at a rate of up to 100 million new frequencies per second. The (externally filtered) cosine wave output can be converted to a square wave by the internal comparator for agile clock generator applications. The device provides two 14-bit phase registers and a single pin for BPSK operation.

For higher-order PSK operation, the I/O interface can be used for phase changes. The 12-bit cosine DAC, coupled with the innovative DDS architecture, provides excellent wideband and narrow-band output SFDR. When configured with the comparator, the 12-bit control DAC facilitates static duty cycle control in the high speed clock generator applications.

The 12-bit digital multiplier permits programmable amplitude modulation, on/off output shaped keying, and precise amplitude control of the cosine DAC output. Chirp functionality is also included for wide bandwidth frequency sweeping applications. The AD9852 programmable 4× to 20× REFCLK multiplier circuit internally generates the 300 MHz system clock from a lower frequency external reference clock. This saves the user the expense and difficulty of implementing a 300 MHz system clock source.

Direct 300 MHz clocking is also accommodated with either single-ended or differential inputs. Single-pin, conventional FSK and the enhanced spectral qualities of ramped FSK are supported. The AD9852 uses advanced 0.35 μ CMOS technology to provide this high level of functionality on a single 3.3 V supply.

The AD9852 is pin-for-pin compatible with the AD9854 single-tone synthesizer. The AD9852 is specified to operate over the extended industrial temperature range of −40°C to +85°C.

Applications

Agile LO frequency synthesis

Programmable clock generator

FM chirp source for radar and scanning systems

Test and measurement equipment

Commercial and amateur RF exciter

Data Sheet, Rev. E, 5/07

Part#	Master fclk	Resolution (Bits)	Tuning Word Width (bits)	Nominal Supply (V)	I Supply total (max)	FS Iout (mA nom)	Compliance Range (V)	REFCLK Multiplier	On-Board Comparator	I/O Interface	Price* (1000-4999)	Product Description
AD9913	250MHz	10	32	Single(+1.8)	63.5mA	4.6	0.8	Yes	No	Parallel, Serial	$9.65	Low power 250 MSPS DDS with 10 bit DAC output
AD9833	25MHz	10	28	Single(+2.3 to +5.5), Single(+2.5), Single(+2.7), Single(+3), Single(+3.3), Single(+3.6), Single(+5)	5.5mA	3	0.65	No	No	Serial	$3.95	25 MHz, Serial Input, Programmable DDS Waveform Generator
AD9831	25MHz	10	32	Single(+3.3), Single(+3.6), Single(+5)	15mA	4	1.5	No	No	Parallel	$6.25	CMOS, 25 MHz Parallel Input DDS with On-Chip 10-Bit DAC & Sine Lookup Table
AD9832	25MHz	10	32	Single(+3.3), Single(+3.6), Single(+5)	15mA	4	1.35	No	No	Serial	$5.00	CMOS, 25 MHz Serial Input DDS with On-Chip 10-Bit DAC & Sine Lookup Table
AD5930	50MHz	10	24	Single(+2.3 to +5.5)	8mA	3.1	0.8	No	No	Serial	$6.30	Programmable Frequency Sweep and Output Burst Waveform Generator
AD5932	50MHz	10	24	Single(+2.3 to +5.5)	8mA	n/a	n/a	Yes	No	Serial	$4.10	Programmable Single-Scan Waveform Generator
AD9830	50MHz	10	32	Single(+5)	60mA	20	1	No	No	Parallel	$10.95	CMOS, 50 MHz Parallel Load DDS with On-Chip 10-Bit DAC & Sine Lookup Table
AD9835	50MHz	10	32	Single(+5)	40mA	4	1.35	No	No	Serial	$5.75	CMOS, Serial Input, 50 MHz DDS with On-Chip 10-Bit DAC
AD9834	75MHz	10	28	Single(+2.3 to +5.5), Single(+2.5), Single(+2.7), Single(+3), Single(+3.3), Single(+3.6), Single(+5)	8.7mA	3	0.8	No	Yes	Serial	$4.95	Low Power, 50 MHz Serial Input DDS With On-Board Comparator
AD9850	125MHz	10	32	Single(+3.3), Single(+5)	96mA	20	1.5	No	Yes	Parallel, Serial	$12.00	CMOS, 125 MHz Serial/Byte-Parallel Input, Complete DDS
AD9851	180MHz	10	32	Single(+3), Single(+3.3), Single(+3.6), Single(+5)	130mA	20	1.5	Yes	Yes	Parallel, Serial	$13.40	180 MHz Complete DDS
AD9852	300MHz	12	48	Single(+3.3)	922mA	20	1	Yes	Yes	Parallel, Serial	$15.40	CMOS, 300 MSPS Complete DDS w/ Clock Multiplier
AD9854	300MHz	12	48	Single(+3.3)	1210mA	10	1	Yes	Yes	Parallel, Serial	$16.90	CMOS 300 MHz, Quadrature, Complete-DDS
AD9859	400MHz	10	32	Multi(+1.8, +3.3)	n/a	20	2.05	Yes	No	Serial	$9.75	400 MSPS, 10-Bit, 1.8 V CMOS DDS
AD9951	400MHz	14	32	Multi(+1.8, +3.3), Single(+1.8)	n/a	10	2.05	Yes	No	Serial	$13.74	400 MSPS 14-Bit, 1.8 V CMOS DDS
AD9952	400MHz	14	32	Multi(+1.8, +3.3), Single(+1.8)	n/a	10	2.05	Yes	Yes	Serial	$15.49	400 MSPS, 14-Bit, 1.8 V, CMOS Direct Digital Synthesizer w/High Speed Comparator
AD9953	400MHz	14	32	Multi(+1.8, +3.3), Single(+1.8)	n/a	10	2.05	Yes	No	Serial	$14.74	400 MSPS, 14-Bit DAC, 1.8 V CMOS Direct Digital Synthesizer w/ 1024x32 RAM
AD9954	400MHz	14	32	Multi(+1.8, +3.3), Single(+1.8)	n/a	10	2.05	Yes	Yes	Serial	$17.24	400 MSPS, 14-Bit, 1.8V CMOS DDS w/ 1024x32 RAM, Linear Sweep Block, & Hi Speed Comparator
AD9956	400MHz	14	48	Multi(+1.8, +3.3)	n/a	10	2.3	No	No	Serial	$17.24	400 MSPS, 14-Bit DAC, 48-Bit Freq Tuning Word, 1.8 V CMOS DDS Based AgileRF™ Synthesizer
AD9958	500MHz	10	32	Multi(+1.8, +3.3)	105mA	10	2.3	Yes	-	Serial	$20.24	2-Channel 500 MSPS DDS with 10-Bit DACs
AD9911	500MHz	10	32	Single(+1.8)	73mA	10	1.8	Yes	-	Serial	$15.50	500 MSPS Direct Digital Synthesizer w/10-Bit DAC
AD9959	500MHz	10	32	Multi(+1.8, +3.3)	180mA	10	2.3	Yes	-	Serial	$37.14	-
AD9858	1000MHz	10	32	Multi(+3.3, +5)	n/a	40	3.8	No	No	Parallel, Serial	$45.12	1 GSPS Direct Digital Synthesizer
AD9910	1000MHz	14	32	Single(+1.8), Single(+3.3)	n/a	20	0.5	Yes	No	Parallel, Serial	$34.91	1 GSPS, 14-Bit, 3.3 V CMOS Direct Digital Synthesizer
AD9912	1000MHz	14	48	Multi(+1.8, +3.3)	394mA	-	0.5	Yes	Yes	Serial	$37.25	1 GSPS 14-Bit, DDS with Spur Reduction Channels

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